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How to extract stiffness at a node in f06 file or .pch file for a particular loadstep ?

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How to extract stiffness at a node in f06 file or .pch file for a particular loadstep ?
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    For SOL105, if you want to additionally print the differential stiffness portion, you can insert the following ALTER:
     
    compile sekdr                  $
    alter 'EMA   GPECT,KDDICT,KDELM,BGPDTS,SILS,CSTMS' $
    MATMOD  EQEXINS,USET,SILS,CASES,,/VECX,/17//1  $
    PARTN  KDGG1,VECX,VECX/,,,KDKEEP/0/0      $
    MESSAGE //'  '                 $
    MESSAGE //'  '                 $
    MESSAGE //'PRINT KDIFF for Case Control, user-defined GRIDs'$
    MESSAGE //'  '                 $
    matprn KDKEEP//                 $ 
    MESSAGE //'  '                 $
    MESSAGE //'  '                 $
    MESSAGE //'  '                 $
    MESSAGE //'  '                 $
     
     
    This will also partition the differential stiffness matrix to just the desired grids. See the attached example.
     
    NOTE: all these samples and alters are use-at-your-own-risk, in that they need user-validation and are officially unsupported.
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  • 0
    For SOL105, if you want to additionally print the differential stiffness portion, you can insert the following ALTER:
     
    compile sekdr                  $
    alter 'EMA   GPECT,KDDICT,KDELM,BGPDTS,SILS,CSTMS' $
    MATMOD  EQEXINS,USET,SILS,CASES,,/VECX,/17//1  $
    PARTN  KDGG1,VECX,VECX/,,,KDKEEP/0/0      $
    MESSAGE //'  '                 $
    MESSAGE //'  '                 $
    MESSAGE //'PRINT KDIFF for Case Control, user-defined GRIDs'$
    MESSAGE //'  '                 $
    matprn KDKEEP//                 $ 
    MESSAGE //'  '                 $
    MESSAGE //'  '                 $
    MESSAGE //'  '                 $
    MESSAGE //'  '                 $
     
     
    This will also partition the differential stiffness matrix to just the desired grids. See the attached example.
     
    NOTE: all these samples and alters are use-at-your-own-risk, in that they need user-validation and are officially unsupported.
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